XCoreTargetTransformInfo.cpp revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f 
1//===-- XCoreTargetTransformInfo.cpp - XCore specific TTI pass ----------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9/// \file
10/// This file implements a TargetTransformInfo analysis pass specific to the
11/// XCore target machine. It uses the target's detailed information to provide
12/// more precise answers to certain TTI queries, while letting the target
13/// independent and default TTI implementations handle the rest.
14///
15//===----------------------------------------------------------------------===//
16
17#include "XCore.h"
18#include "llvm/Analysis/TargetTransformInfo.h"
19#include "llvm/Support/Debug.h"
20#include "llvm/Target/CostTable.h"
21#include "llvm/Target/TargetLowering.h"
22using namespace llvm;
23
24#define DEBUG_TYPE "xcoretti"
25
26// Declare the pass initialization routine locally as target-specific passes
27// don't have a target-wide initialization entry point, and so we rely on the
28// pass constructor initialization.
29namespace llvm {
30void initializeXCoreTTIPass(PassRegistry &);
31}
32
33namespace {
34
35class XCoreTTI final : public ImmutablePass, public TargetTransformInfo {
36public:
37  XCoreTTI() : ImmutablePass(ID) {
38    llvm_unreachable("This pass cannot be directly constructed");
39  }
40
41  XCoreTTI(const XCoreTargetMachine *TM)
42      : ImmutablePass(ID) {
43    initializeXCoreTTIPass(*PassRegistry::getPassRegistry());
44  }
45
46  virtual void initializePass() override {
47    pushTTIStack(this);
48  }
49
50  virtual void getAnalysisUsage(AnalysisUsage &AU) const override {
51    TargetTransformInfo::getAnalysisUsage(AU);
52  }
53
54  static char ID;
55
56  virtual void *getAdjustedAnalysisPointer(const void *ID) override {
57    if (ID == &TargetTransformInfo::ID)
58      return (TargetTransformInfo*)this;
59    return this;
60  }
61
62  unsigned getNumberOfRegisters(bool Vector) const override {
63    if (Vector) {
64       return 0;
65    }
66    return 12;
67  }
68};
69
70} // end anonymous namespace
71
72INITIALIZE_AG_PASS(XCoreTTI, TargetTransformInfo, "xcoretti",
73                   "XCore Target Transform Info", true, true, false)
74char XCoreTTI::ID = 0;
75
76
77ImmutablePass *
78llvm::createXCoreTargetTransformInfoPass(const XCoreTargetMachine *TM) {
79  return new XCoreTTI(TM);
80}
81